QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

8km NE of Coalinga, CA

· 9.9 km deep · released about 490 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kings County 44 kmFresno County 86 kmSan Benito County 86 kmSan Luis Obispo County 89 kmMonterey County 93 kmMerced County 119 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.8 (md)
Depth
9.9 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Kings County, 44 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2859 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 490 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 36.1818, -120.2843. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kings County, CA 44 km (27 mi) WNW of here earthquakes near Kings County
Fresno County, CA 86 km (53 mi) SW of here earthquakes near Fresno County
San Benito County, CA 86 km (54 mi) ESE of here earthquakes near San Benito County
San Luis Obispo County, CA 89 km (56 mi) N of here earthquakes near San Luis Obispo County
Monterey County, CA 93 km (58 mi) E of here earthquakes near Monterey County
Merced County, CA 119 km (74 mi) SSE of here earthquakes near Merced County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

53 earthquakes have been recorded within 50 km since this one.

  1. 2.9 10km NNW of Cholame, CA
  2. 1.9 16km S of Kettleman City, CA
  3. 2.1 21km NW of Parkfield, CA
  4. 2.3 22km NE of San Ardo, CA
  5. 1.7 9km N of Avenal, CA
  6. 3.0 22km ENE of San Lucas, CA
  7. 1.6 18km NW of Parkfield, CA
  8. 1.9 10km WSW of Huron, CA
  9. 1.6 5km NW of Parkfield, CA
  10. 1.8 12km ENE of Coalinga, CA
  11. 2.9 12km ENE of Coalinga, CA
  12. 1.7 23km NW of Parkfield, CA
  13. 2.4 25km E of San Ardo, CA
  14. 2.3 14km SW of Cantua Creek, CA
  15. 2.4 10km ENE of Coalinga, CA

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.0 on 2018-11-27 — it released about 61 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.